Solar high-temperature electrolyzed water coupling hydrogen production system and process based on amino thermal chemical energy storage

A high-temperature electrolysis and thermochemical technology, used in the chemical industry, electrolysis components, electrolysis process, etc., can solve the problems of incomplete conversion, harsh reaction conditions, and high operating costs of energy storage systems, and achieve strong fluidity and low compressibility. , The effect of high heat transfer efficiency

Active Publication Date: 2021-06-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amino thermochemical energy storage system is simple and miniaturized, and can effectively collect, store, transport, and convert solar energy without worrying about the transient nature of solar radiation, and the energy produced by the synthesis reaction is of high quality, but NH 3 / N 2 / H 2 There are still some problems to be solved in the practical application of thermochemical energy storage systems, such as H 2 and N 2 The problem of long-term safe storage; the reaction is operated under high temperature, high pressure, and catalyst, the reaction conditions are relatively harsh, and the operation cost of the energy storage system is high; the incomplete conversion of the reaction, etc.

Method used

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  • Solar high-temperature electrolyzed water coupling hydrogen production system and process based on amino thermal chemical energy storage

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Effect test

Embodiment 1

[0026] The direct solar radiation intensity is taken as 1kW / m 2 , the concentration ratio is 200, aiming to test the feasibility of the system under ordinary illumination and concentration conditions; provide the required heat for the ammonia decomposition reaction in the endothermic reactor 2 and maintain the reaction temperature through the solar heat collection device To ensure the progress of the reaction, the endothermic reactor 2 has a length of 355mm and a diameter of 30mm; liquid ammonia is exchanged from the normal temperature pressure storage tank 4 to the first heat exchanger 3, and the temperature rises from normal temperature to about 400°C and enters the endothermic Reactor 2, ammonia decomposition reaction occurs in endothermic reactor 2 to make the product N 2 、H 2 The temperature rises to about 700°C, then enters the first heat exchanger 3 for heat exchange, and is finally stored in the normal temperature and pressure storage tank 4; the N stored in the norma...

Embodiment 2

[0028] Liquid ammonia is exchanged from the normal temperature pressure storage tank 4 to the first heat exchanger 3, and the temperature rises from normal temperature to about 400°C and then enters the endothermic reactor 2, where the ammonia decomposition reaction occurs to make the product N 2 、H 2 The temperature rises to about 700°C and enters the first heat exchanger 3 for heat exchange, and is finally stored in the normal temperature and pressure storage tank 4; the N stored in the normal temperature and pressure storage tank 4 2 、H 2 First enter the fifth heat exchanger 5 for heat exchange to raise the temperature from normal temperature to about 250°C, the total flow rate of the reaction gas is 4.25g / s, then enter the second heat exchanger 6 for heat exchange to raise the temperature from 250°C to 630°C , and finally enters the adiabatic reactor 7 for the synthesis of ammonia. The length of the adiabatic reactor is 115cm, and the length of the adiabatic reactor is 18...

Embodiment 3

[0030] Liquid ammonia is exchanged from the normal temperature pressure storage tank 4 to the first heat exchanger 3, and the temperature rises from normal temperature to about 400°C and then enters the endothermic reactor 2, where the ammonia decomposition reaction occurs to make the product N 2 、H 2 The temperature rises to about 700°C and enters the first heat exchanger 3 for heat exchange, and is finally stored in the normal temperature and pressure storage tank 4; the N stored in the normal temperature and pressure storage tank 4 2 、H 2 First enter the fifth heat exchanger 5 for heat exchange to raise the temperature from normal temperature to about 250°C, the total flow rate of the reaction gas is 4.36g / s, then enter the second heat exchanger 6 for heat exchange to raise the temperature from 200°C to 620°C , and finally enters the adiabatic reactor 7 to generate ammonia. The length of the adiabatic reactor is 120cm, and the length of the adiabatic reactor is 20mm. The ...

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Abstract

The invention discloses a solar high-temperature electrolyzed water coupling hydrogen production system and process based on amino thermal chemical energy storage, and belongs to the technical field of solar photo-thermal electrolyzed water hydrogen production. The system integrates an amino thermochemical energy storage unit, a recompression S-CO2 Brayton cycle unit and a high-temperature water electrolysis hydrogen production unit, all the units are connected and synergistically acted through a plurality of heat exchangers, the amino thermochemical energy storage unit absorbs the temperature of solar decomposition and heat energy release by ammonia synthesis, and on the basis, the deep waste heat recovery method of the system is provided for waste heat caused by various energy transfer processes in the integrated solar hydrogen production system, the collaborative optimization and complementation process of solar energy and chemical energy is achieved, the target energy utilization rate can reach 27%, a brand new path is provided for solar hydrogen production, and the system has great significance in solar energy utilization and storage.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by solar photothermal electrolysis of water, and specifically relates to a system and process for hydrogen production coupled with solar high-temperature electrolysis of water based on energy storage of amino thermochemical energy. Background technique [0002] Solar energy is a clean and renewable energy. Among all renewable energy sources, solar energy is the most widely distributed and the easiest to obtain. Due to the intermittent, low density, instability, and difficulty in continuous supply of solar energy, there are still many problems to be solved for the wide application of pure solar thermal power generation. Among them, how to realize efficient and large-scale storage of solar energy to ensure continuous supply of solar energy throughout the day It is the key to solar thermal power generation technology. Solid oxide fuel cell is an ideal fuel cell. The difficulty of solid o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B9/00C25B1/04C25B1/55C25B9/60C25B9/67C25B15/021
CPCC25B9/00C25B1/04C25B15/02Y02P20/10Y02P20/129
Inventor 陈晨夏起赵建国冯帅明孔明民钱挺杜伟何兴
Owner ZHEJIANG UNIV OF TECH
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